Somewhere else in California right around the same time a very very tired software engineer was clearing his hard drive but not really his hard drive but a network drive containing the entire source database for the company. And as luck would have it, the backup tapes were empty.
Oh dear! What happened next? (Once you’ve used a filesystem with snapshots, you never want to go back. I’ve done one or two mistaken deletions in my time, and, I think, just one bulk restore from tape in anger.)